Congress passed a law in 1992 requiring the documents surrounding President Kennedy's assassination to be released by 2017, but the release has been held up by national security concerns.

Sirhan's sentence was commuted to life with the possibility of parole in 1972. On Friday, the California Board of Parole recommended parole.

On this edition of "Political Rewind," "Hardball" host Chris Matthews joins us to discuss his new book, which offers fresh insights on the life of...